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Boyds Creek Synform

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Series: GSA Special Papers
Published: 01 January 1989
DOI: 10.1130/SPE231-p93
..., the generally similar areas of the Boyds Creek synform and the West Point mélange have anomalously high Cu-Pb-Zn and Au signatures that coincide locally with zones of tourmalinite, iron formation, gossan, and altered ultramafic bodies. These data suggest that hydrothermal systems were associated...
Journal Article
Journal: GSA Bulletin
Published: 01 July 2014
GSA Bulletin (2014) 126 (7-8): 990–1015.
... on the northwest along the Katy Creek fault ( Bentley and Neathery, 1970 ). This sparsely studied complex essentially resides as a synformal klippe above the Wedowee-Emuckfaw-Dahlonega basin and roots to the southeast of the latter sequence somewhere outboard of the Pine Mountain window ( Fig. 1 ). The complex has...
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Journal Article
Published: 01 July 2015
Rocky Mountain Geology (2015) 50 (1): 30–118.
... occupied by the isolated Hanna, Carbon, Pass Creek, and Laramie basins. Field-based research resulted in three contiguous geologic maps that focus on modern basin margins and boundaries among those eastern elements. Analyses of derived cross sections and restored stratigraphic columns suggest that active...
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Journal Article
Published: 01 December 2020
Rocky Mountain Geology (2020) 55 (2): 91–129.
... Creek Basin. The northern boundary of the Hanna Basin is set directly upon southern anticlinal folds from the Freezeout and Shirley Mountains. Those anticlinal folds represented older uplift histories than Elk Mountain, dating back at least to the early Paleocene (see Lillegraven et al., 2004 , figs...
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Journal Article
Published: 10 February 2006
Canadian Journal of Earth Sciences (2005) 42 (12): 2141–2160.
... of the VCF, along strike to the north. Within the Frenchman Cap dome, the Anstey Range synform and antiform (ARS and ARA), mapped east of the Ratchford Creek – Perry River normal fault (as opposed to the Ratchford Creek Thrust Fault to the north; see Journeay 1986 ), are potential matches to the Mulvehill...
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Journal Article
Journal: Geosphere
Published: 26 October 2017
Geosphere (2017) 13 (6): 1867–1886.
... in structural domains of synformal warping near the detachment breakaway ( Spencer, 1985 ). Spencer (1985) argued that synformal down-warping creates compressive stresses that overwhelm regional extensional stress during denudation, shifting the local extension direction to north-south, accounting for east...
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Journal Article
Published: 01 July 2000
Journal of Sedimentary Research (2000) 70 (4): 879–895.
... marine and terrestrial strata, which broadly reflect the three stages in basin development ( Murray 1983 ; Baker et al. 1993 ). The northern part of the basin was little affected by inversion tectonism ( Dickins and Malone 1973 ). During the Triassic it was warped into a regional-scale synform, the Nebo...
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Journal Article
Published: 01 January 2000
Rocky Mountain Geology (2000) 35 (2): 139–162.
... and adjacent country rocks in the northern Colorado Front Range ( Figs. 1 and 2 ). The Moose Mountain shear zone is located about 10 km south of Big Thompson Canyon, between the Buckhorn Creek and Skin Gulch shear zones to the north and the Idaho Springs–Ralston shear zone to the south. The shear zone...
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Journal Article
Journal: Geosphere
Published: 01 December 2015
Geosphere (2015) 11 (6): 1996–2014.
...) are in a synformal keel (ten σ 1 vectors), a north-facing limb (23 σ 1 vectors) and a south-facing limb (eight σ 1 vectors). Orientation of σ 1 is most dispersed perpendicular to the fold axis in the antiformal crest sites, with both steep σ 1 and steep to moderate northwest plunges relative to the WDF. Only...
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Journal Article
Published: 26 June 2018
Bulletin of the Seismological Society of America (2018) 108 (4): 1819–1836.
...‐wavelength folding may also develop with broad antiforms and synforms associated, respectively, with the upstanding ridges and down‐dropped valleys. The northwestern South Island of New Zealand northwest of the Alpine fault (the principal component of the fault system defining the boundary between...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2000
GSA Bulletin (2000) 112 (7): 1023–1042.
... paleotemperatures broadly mirrors the synformal structure of the basin, with the lowest paleotemperatures occurring at the core of the synclinorium ( Underwood et al., 1996 ). Nevertheless, when examined in detail, the correlation between stratigraphic position and paleotemperature is poor, leading Underwood et al...
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Journal Article
Journal: PALAIOS
Published: 01 November 2016
PALAIOS (2016) 31 (11): 533–548.
.... Slavik L. Hladil J. 2015 , Petrophysical record of the late Silurian shallow-water carbonate facies across the Lau Event (Prague Synform, Czech Republic) and dynamic time warping alignment of the magnetic susceptibility logs...
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Journal Article
Published: 01 September 2003
South African Journal of Geology (2003) 106 (2-3): 165–192.
... of pipes within clusters, or even the effects of the local structures on volcanism. Deakin and White (1991) describe the emplacement of the Argyle lamproite during local extension related to transcurrent shearing within the Halls Creek Mobile Zone of Australia. White et al. (1995) proposed...
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Journal Article
Published: 01 May 2005
Journal of Sedimentary Research (2005) 75 (3): 350–368.
... in the upper half. The paleosol is characterized by nested synformal-antiformal slickensides, rare filled soil cracks, rare pedogenic carbonate nodules, and well-developed peds ( Fig. 13 ). Basinward to the south, in Kansas, the paleosol decreases to 1.0 m thick and has less well-developed soil structures...
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Journal Article
Published: 10 June 2021
Journal of Sedimentary Research (2021) 91 (6): 571–594.
... over Pennsylvanian–Permian and younger strata ( Lindsey 1998 ). The synformal axis of the basin, the La Veta syncline, parallels the range front ( Fig. 1 A). The sedimentary basin-fill that forms the west limb of the syncline dips eastward toward the basin axis, whereas the basin fill that forms...
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Journal Article
Journal: Economic Geology
Published: 01 January 2020
Economic Geology (2020) 115 (1): 153–175.
... Superior and especially to the east (~10°). Nearby porphyry copper deposits include Ray to the east and Resolution to the north. The map area lies between the Superior (Pioneer) and Mineral Creek mining districts. The Superior (Pioneer) district includes the historic Silver King and Magma mines...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP453.8
EISBN: 9781786203342
... to assess the regional-scale mineral prospectivity of the northern Halls Creek Orogen, Western Australia. An important step in achieving this aim at the regional scale was understanding crustal architecture, in particular determining structures and rock units that helped to delineate prospective regions...
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... of the Bowens Creek fault is the Cooper Creek anticline. Map compiled from numerous sources. Eastern Blue Ridge Stratigraphy Lynchburg Group Wills Ridge Formation Ashe Formation (Metamorphic Suite) Figure 2. Lithostratigraphy of the eastern Blue Ridge. Field trip stops are shown...
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Journal Article
Journal: SEG Discovery
Published: 01 April 1997
SEG Discovery (1997) (29): 1–48.
... graduate exploration worldwide. With leadership from Jim Boyd, Harry theses, summer jobs for students, endowment of academic chairs, and building of classrooms and laboratories-all with 23-cent Burgess, and Paul Bailly, an organization was created that was large dollars. and effective and at the same time...
Series: GSA Field Guide
Published: 29 March 2018
DOI: 10.1130/2018.0050(09)
EISBN: 9780813756509
... pods/interlayers of amphibolite, Shooting Creek schist, and Rainbow Springs quartzite Mafic and ultramafic complexes: Webster-Addie, Buck Creek, and Carroll Knob Detrital zircons: 1.3–1.0 & 1.5–1.3 Ga abundant, lesser 1.9, 1.8, 1.6, 0.9, 0.8, and 0.7 Ga Cowrock. Coweeta Group: Ridgepole...
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